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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating activities:      
Net loss $ (6,968) $ (5,340) $ (2,205)
Adjustments to reconcile net loss to net cash used in operating activities:      
Loss (gain) on derivative instruments 137 (152) (694)
Depreciation and amortization 46 67 91
Loss on equity method investment 623 220   
Property abandonment and impairment 10 55 51
Employee stock option expense (benefit) 697 2,513 (269)
Deferred income taxes (635) (867) 611
Amortization of interest on long-term debt 217 19   
Gain on asset and equity security sales (1,937) (1,017) (1,391)
Gain on deconsolidation of PBM subsidiary    (724)   
Changes in operating assets and liabilities:      
Prepaid expenses and other current assets (2) 49 96
Accounts payable and other current liabilities (119) 414 112
Current income taxes payable    (677) 385
Net cash used in operating activities (7,931) (5,440) (3,213)
Investing activities:      
Additions to mineral properties (1,765) (11) (5)
Additions to other assets (119) (60) (15)
Purchase of marketable equity securities    (358)   
(Sale) purchase of derivative instruments, net 42 (135) 99
Proceeds from sale of marketable equity securities 2,035 1,301 1,852
Decrease in cash from deconsolidation of PBM subsidiary    (1,083)   
Proceeds from sale of other assets    22   
Net cash provided by investing activities 193 (324) 1,931
Financing activities:      
Short-term margin loan (repayment) borrowing, net (872) 2,800   
Repayment of long-term debt (500)      
Proceeds from common stock offering, net 8,937      
Proceeds from exercise of options 247      
Payment to noncontrolling interest (200)      
Noncontrolling interest contribution 80 1,496 1,286
Net cash provided by financing activities 7,692 4,296 1,286
Net increase (decrease) in cash and cash equivalents (46) (1,468) 4
Cash and cash equivalents, beginning of year 478 1,946 1,942
Cash and cash equivalents, end of year 432 478 1,946
Supplemental disclosure of cash flow information:      
Cash paid for interest 71 31 23
Cash paid for income taxes    319   
Supplemental disclosure of non-cash flow investing and financing activities:      
Acquisition of mineral properties for stock 1,000      
Loan to noncontrolling interest 504      
Issuance of stock to noncontrolling interest 140      
Assumption of Mt. Hamilton long-term debt on acquisition of Mt. Hamilton mineral property    3,066   
Noncontrolling shareholder contribution of Mt. Hamilton property    3,000   
Reclassification of deferred noncontrolling shareholder payments to additional paid-in capital    1,188   
Reclassification of deferred noncontrolling shareholder payments to noncontrolling interest    $ 1,594